<!DOCTYPE html><html lang="en" xmlns:th="http://www.w3.org/1999/xhtml"><head>    <meta charset="UTF-8">    <title>Title</title></head><body><form method="post" th:action="@{/pay}">    <button type="submit"><img src="/paypal.jpg" width="100px;" height="30px;"/></button></form></body></html>